Radio antenna



April 15, 1941. M. A. SCHWARTZ 2,238,135

RADIO ANTENNA Filed March 9, 1940 Patented Apr. 15, 1941 RADIO ANTENNA Max A. Schwartz, Chicago, Ill., assgnor to Century Radio Aerial, Inc., a corporation of Illinois Application March 9, 1940, Serial No. 323,103

9 Claims. (Cl. Z50-33) My invention relates to an aerial or antenna such as for radio receiving sets.

The object of the invention is to provide a novel and simple device for convenient application to a window frame of a building or the like,?'

and which does away with unsightly wires or aerials dangling from windows, or roofs, or other outside structures for such purposes and of cumbersome structure and unsightly appearance Another object of the invention is to provide a simple aerial which may be mounted at a window for convenient connection of a wire to a radio receiving set at the usual connection for an aerial or antenna and which may be applied to any suitable window or like construction and adjusted at various angles, as well as provided with insulating means at the end thereof to prevent contact electrically with an adjacent structure.

Further objects and advantages will appear and be brought out more fully in the following specincation, reference being had to the accompanying drawing, in which:

Fig. l is an elevation applied to a window;

Fig. 2 is an enlarged fragmentary sectional view of the anchoring;

Fig. 3 is a section on the line 3-3 of Fig. 2;

Fig. 4 is an enlarged fragmentary section of the tip;

Fig. 5 is an enlarged fragmentary section of the brace; and

Fig. 6 is a section on line 6 5 of Fig. 5.

Referring to the drawing, I0 designates the wall of a building and its window opening in which is disposed a window frame I I having a sill I2 usually of wood and a sub-sill i3 of stone, metal or other suitable material. The upper sash is designated at I4 and the lower sash at I5, while I6 designates the sides of the frame projecting outwardly from the sash. The device includes an anchoring block or base I'I of wood or other cushioning material and shown of rectangular crosssection or may be rubber, either soft or hard,

Bakelite, porcelain or other molded plastic. This anchoring block or base has a beveled lower end I8 adapted to fit the top surface of the sub-sill I3 and preferably squared at its upper end I9. The upper end is centrally bored as at 20 with an enlarged upper portion 2 I. The small lower part may, for example, be 4 inches deep and inch in diameter, while the upper part may be lx/z inches deep with a 1/2 inch bore, thus providing an upwardly facing shoulder between the small lower part of the bore and the enlarged upper part thereof, although it is not desired to be restricted to the measurements specified. The anever, the bendable or spring metal brace 3i will i edge of the Sill I2.

tenna rod or aerial proper is designated at 22, being of suitable conducting material such as steel, chrome plated or nickeled, and of round or other stock of spring steel or other suitable metal, This rod is tted in the socket formed by the bores 2U and 2! and soldered in position as indicated at 23, although other suitable anchoring means may be employed. In addition, an L-shaped bracket 24 is provided disposed in the enlarged bore portion 2| substantially like the cord of an arc, and vertically positioned so as to engage the upwardly facing shoulder or to be spaced therefrom, but rmly heldin position by the solder or other suitable anchoring material poured into the socket. The horizontal leg 26 of the bracket is spaced from the upper end of the block or base and the solder in the socket and has a hole 2l adjacent the vertical leg for receiving the rod 22 and a hole 28 toward the free end thereof for receiving a screw 29 which constitutes a binding screw and which may also extend into the block or base Il from its upper end, if desired, to serve as an additional anchoring means to prevent the bracket from turning or becoming loose. The binding screw 29 serves for connection of the aerial wire 30 leading to the radio receiving set (not shown) through the window opening.

In order to mount the device in position, as shown in Figs. l and 2, the beveled lower end I8 of the base or block Il may rest rmly on the subsill I3 or may pivot on the tapered edge thereof with the remaining portion of the bottom face I8 spaced from the top face of the sill, thus in effect producing a hinged or pivot mounting for the base, While the tapered edge fits against the front A bendable brace or strip 3l is secured to the inner face of the base Il, as by a screw 32, and is curved over the top of the sill I2 where it may be attached by screws 33, thus rmly anchoring the base in position. Howpermit the base II to be swung up and down in different angular relation to the frame and in order to secure the rod in any desired position, a rigid metal brace 34 is provided. This brace preferably has at least two screw holes for screws 35 at the inside of one side of the window frame and at the opposite end is provided with a split clamp or sleeve 36 which may be formed by bending the adjacent end of the bar forming the brace 34 so that the terminal end 31 is bent back against the bar proper adjacent the sleeve. Registering apertures are provided in the contacting portions 34 and 3l to take -a clamping bolt 38 which secures an apertured cushion sleeve or bushing 39 in position. This bushing may be of soft rubber, felt or other insulation and when clamped on the antenna rod 22 will grip the latter with suitable friction, but may be slid or moved along the rod, especially by releasing the clamping bolt or screw 33 so that by swinging the brace up or down or changing its angular relation to the vertical plane of the window frame and the position of the screws the antenna rod may be disposed in clierent angular relation to the frame and building wall, that is, raised or lowered to Vary the angle of divergence and relative position of the antenna rod, as well as its projection upwardly and downwardly. In this sense, the rod may be said to be pivoted or hinged at the base. The tip of the rod is provided with an insulating soft rubber or other suitable head or terminal tip lill to prevent injury or electrical contact with adjoining objects or adjacent buildings.

While l have illustrated and described the pre ferred form of construction for carrying my invention into effect, this is capable of variation and modification without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modicaticns as come within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

l. An antenna including an anchoring block having a bore at one end, a conductor rod embedded in a filling in the bore of the block and a brace having a clamp at one end with an insulation sleeve gripping the rod and slidable along the same, and a terminal connected to the block and rod at the bore for connection to a receiving set.

2. An antenna including a base having a beveled end adapted to rest on a subsill, a curved strip for connecting the base to a Window sill against the outer edge thereof whereby the base may be positioned at different angles of inclination and a rod anchored at its lower end in the upper portion of the base and having a Wire terminal.

3. An antenna including an anchoring block, means for securing the anchoring block in position, said block having a socket, a conductor rod anchored in the socket, a first brace anchored in the socket and having an opening receiving the rod and a wire terminal, and a second brace having a sleeve of soft material gripping the rod and means of attachment to a vertical support such as a window frame at its opposite end.

Ll. A radio antenna including an elongated supporting member having a stepped bore in its upper end, a molded lling in the bore, a conductor rod having its lower end extending into the bore and anchored into the lling, an angularshaped bracket anchored in the lling at one side of the rod and resting on the step, the upper end of the bracket extending laterally and having a hole receiving the rod, a securing member attaching the same to the supporting member to form a terminal for an aerial wire, means for anchoring the rod to an upright support in inclined position and means for anchoring the supporting member to a horizontal support.

5. A radio antenna including an elongated supporting member having a bore in its upper end, a molded filling in the bore, a conductor rod having its lower end extending into the bore and anchored into the filling, an angular shaped bracket anchored in the filling at one side of the rod, the upper end of the bracket extending laterally and having a hole receiving the rod, an aerial wire terminal on said lateral end, and means to anchor the rod and base to a Window frame at different inclinations.

6. An antenna including an anchoring block having a longitudinal bore, an electrical conductor rod anchored at one end in a lling in the bore, means for attaching the block to a sill, an arm connected to and insulated from the rod and forming a brace for attachment to a Window frame or other upright support and a bendable brace attached to the block along one face and having a projecting end for attachment on top of the sill.

7. An antenna including an anchoring base having an opening forming a socket, a metallic rod having one end embedded longitudinally in a lling in the socket, an insulator on the other end of the rod, a brace movable on the rod and having means to clamp the same in longitudinally adjusted position thereon and insulated from the rod, and an angular brace for attaching the base to a support to dispose the rod at different inclinations.

8. An antenna including an anchoring block having a beveled lower end adapted to rest on a subsill against the front of a sill, a conductor rod embedded at its lower end longitudinally and axially in the block, a brace having a clamp at one end with an enclosed insulating sleeve gripping the rod, a bracket anchored in the block to receive the rod in electrical contact therewith and having a binding terminal for connection of a conductor from the aerial post of a radio receiv ing set, and means to anchor the block.

9. An antenna including an aerial rod of spring metal, a socket member having a lling for anchoring the lower end of the rod, a bendable brace secured to the socket member for attaching said member to the sill of a Window to extend upwardly in an inclined position and to vary the angle of inclination thereof and a brace of flat stock extending edgewise vertically and having a split clamp at the free end thereof to grip the rod and slidable thereon to vary the angular relation of the rod relative to an upright support and means at its opposite end adapted for attachment to the upright support such as the inside of a window frame.

MAX A. SCHWARTZ. 

